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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14
// UNSUPPORTED: libcpp-has-no-incomplete-pstl
// <numeric>
// template<class ExecutionPolicy, class ForwardIterator>
// typename iterator_traits<ForwardIterator>::value_type
// reduce(ExecutionPolicy&& exec,
// ForwardIterator first, ForwardIterator last);
// template<class ExecutionPolicy, class ForwardIterator, class T, class BinaryOperation>
// T reduce(ExecutionPolicy&& exec,
// ForwardIterator first, ForwardIterator last, T init,
// BinaryOperation binary_op);
#include <numeric>
#include <vector>
#include "MoveOnly.h"
#include "test_execution_policies.h"
#include "test_iterators.h"
#include "test_macros.h"
template <class Iter, class ValueT>
struct Test {
template <class Policy>
void operator()(Policy&& policy) {
for (const auto& pair : {std::pair{0, 34}, {1, 36}, {2, 39}, {100, 5184}, {350, 61809}}) {
auto [size, expected] = pair;
std::vector<int> a(size);
for (int i = 0; i != size; ++i)
a[i] = i;
{
decltype(auto) ret = std::reduce(
policy, Iter(std::data(a)), Iter(std::data(a) + std::size(a)), ValueT(34), [](ValueT i, ValueT j) {
return i + j + 2;
});
static_assert(std::is_same_v<decltype(ret), ValueT>);
assert(ret == ValueT(expected));
}
{
decltype(auto) ret = std::reduce(policy, Iter(std::data(a)), Iter(std::data(a) + std::size(a)), ValueT(34));
static_assert(std::is_same_v<decltype(ret), ValueT>);
assert(ret == expected - 2 * size);
}
{
decltype(auto) ret = std::reduce(policy, Iter(std::data(a)), Iter(std::data(a) + std::size(a)));
static_assert(std::is_same_v<decltype(ret), typename std::iterator_traits<Iter>::value_type>);
assert(ret == expected - 2 * size - 34);
}
}
}
};
int main(int, char**) {
types::for_each(types::forward_iterator_list<int*>{}, types::apply_type_identity{[](auto v) {
using Iter = typename decltype(v)::type;
types::for_each(
types::type_list<int, MoveOnly>{},
TestIteratorWithPolicies<types::partial_instantiation<Test, Iter>::template apply>{});
}});
return 0;
}
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